Cav3.3 is a calcium channel of the T-type that is involved in many brain processes. Contrary to other calcium channels Cav3.3 is activated by relatively low/negative voltages. Cav3.3 is not a classic cannabinoid receptor but its activity is modulated by cannabinoids. Since cannabinoids have a physiological effect on Cav3.3 it is effectively a cannabinoid receptor.

Chemical Name: 
Calcium channel, voltage-dependent, T type, alpha 1I subunit
IUPHAR entry: 
Wikipedia entry: 

Brain (cerebellum, occipital lobe, frontal lobe, amygdale, caudate nucleus, hippocampus > temporal lobe, putamen > substantia nigra, medulla). Isocortex, olfactory > striatum > cortical subplate, hippocampus > thalamus, hypothalamus, pallidum, midbrain, medulla. Soma and entire dendrite in cortical CA3, hippocampal and subicular neurons.

Literature Discussion: 

NarGly NADA Anandamide CBD Δ9THC


Pertwee, R.G., Howlett, A.C., Abood, M.E., Alexander, S.P.H., Di Marzo, V., Elphick, M.R., Greasley, P.J., Hansen, H.S., Kunos, G., Mackie, K., et al. (2010). International Union of Basic and Clinical Pharmacology. LXXIX. cannabinoid receptors and their ligands: beyond CB₁ and CB₂. Pharmacol. Rev. 62, 588–631.